Process of mixing white lead with oil



A. S. MOSES.

PROCESS OF MIXING WHITE LEAD WITH OIL APPLICATION FILED JUNE 21.1918.

1,371,926, Patented Man 15, 1921.

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ASHELEIGH S. MOSES, OF NEW YORK, N. Y., ASSIGNOR' TO NATIONAL LEAD COMPANY,

OF NEW YORK, N. Y., A CORPORATION OF NEW YORK. I

PROCESS OF MIX ING WHITE LEAD WITH OIL.

T all whom it may concern:

Be it known that I, ASHELEIGH S. Mosns,.

a citizen of the United States, and residing at New York, in the State of New York, have invented a certain new and useful Improvement in Processes of Mixing White Lead with Oil, of which the following is a specification.

This invention relates to a method of mixlarly for producinga mixture of dry white lead, pulp white lead, and oil.

In methods and apparatus as now employed for mixing such paints, it has been the practice heretofore to mix them in batches, the difierent ingredients being supplied to mixing mechanism and mixed for a. sufiicientperiod to blend these ingredients together into a homogeneous mass. Such a method and apparatus, however, requires considerable. time, power and labor, and there are periods during the filling and discharge of the apparatus that the operation is interrupted.

Some of the objects of this invention, therefore, are to provide a method and apparatus which will be continuous in theiroperation, and in which the product will be uniform.

Further objects will appear from the detail description taken in connection with the accompanying drawing. in. which, the figure is a view showing an apparatus embody-- ing this invention.

The apparatus generally stated comprises a pug mill 1, of usual construction, but preferably of the double shaft type. This mill has mounted therein, pugging mechanism of well known construction. At the inlet end of the mill area pair of rolls 2, which mill the material and discharge it to the pugging mechanism, the material being fed to the rolls through a hopper 3. The outlet 4 of the pugging mill may be of any usual and 45 well known construction, and further description thereof is, therefore, unnecessary.

The dry white lead is contained in a suitable storage bin 5, and discharges toa meter: ing feeder 6, which measures the ,dry white lead and discharges it to the hopper 3 through a spout 7. The pulp white lead is feduniformly from a tank 8, through a spout 9, to the hopper 3, and in this tank is a rotary arm 10, mounted on the end of a shaft 11, which is driven by any suitable source of I Specification of Letters Patent.

ing white lead or the like, and more particu- Patented Mar. 15, 1921;

Application filed June 21, 1918. Serial No. 241,283.

power to keep the pulp lead stirred up and uniform in quality;- The dry white lead and pulp white lead are thus fed to the milling rolls in uniform and measured quantities, and after being milled are discharged to the inlet end of the pugging mill.

The oil is contained in a suitable tank 12,

and discharges by a pipe 13 provided with a suitable'controlling valve 14:, to a distributing trough 15, from which the oil is fed,

to the pug mill. For this purpose a primary supply of oil is fed by a pipe 16 from one end of the trough to the inlet end of the pug mill, and this pipe is provided with a control valve 17. A short distance from the end of the pug mill (about three feet from the discharge end) is an oil pipe 18, which discharges the final. quantity of oil from the trough 15 to the pug mill, and this pipe is also provided with e control valve 19.. It

I will thus be seen thataaquantity of oil is fed into the pug mill at the point where the milling rolls discharge the mixture of dry White lead and pulp lead to the pugging mechanism, while another quantity of oil is discharged into the pug mill near its discharge end. From the pug mill the mixture is discharged into one or more finishing mills, which may be similar in construction to the mill 1, one of these mills being shown at 20, its milling rollers at Q1, and its receiving hopper at 22.

In the operation of the process and apparatus embodying this invention, the dry white lead and the pulp lead are fed to the mill rolls and milled, together, and discharged to the pugging mechanism of the pug mill. This pugging mechanism thoroughly mixes the pulp white lead and dry white lead to a partial homogeneous mass, and added to this mass is a small or primary quantity of oil through the'pipes 16, and this oil becomes thoroughly blended with the dry white lead andpulp lead as the pugging operation proceeds. After ,a preloo determined, pugging operation, the final continuous, it is not necessary to interrupt the same. i

It is obvious that Various changes may be made in the details of the method and apparatus Without departing from the spirit of this invention. It is, therefore. to be understood that this invention is not to be limited to the specific details described and shown.

Having thus described the invention, What is claimed is:

l. The'process of mixing White lead comprising,'mixing dry lead and pulp White lead, adding to and combining with said mixture-a primary quantity of oil, and adding to and combining With said last mixture a final quantity of oil.

2. The process of mixing White lead comprising as a continuous operation, mixing dry Whitelead and pulp White lead, adding to and combining Withsaid mixture a primary quantity of oil, and adding to and combining'with said last mixture a final quantity of oil. 7

3. The process of mixing White lead comprising, mixing and milling together dry white lead and pulp White lead, adding to the milled'mixture a primary quantity of oil, pugging said last mixture, and adding to and incorporating with the pugged mixture a final quantity ofoil'. 1

at. The process of mixing White lead comprising as a continuous operationymixing and milling together dry lead and pulp Wl1l't6 lead, adding to the milled mixture a I 40 primary quantity of oil, pugging said last mixture, and adding to and incorporating wfithl the pugged mixture a final quantity o 01.

'5. The process of mixing White lead comprising as a continuous operation, mixing and milling together dry lead and pulp lead, adding to the milled mixture a primary quantity of oil, pugging said last mixture, adding to said last mixture during and after a pugging operation a final quantityof oil,

and subjecting said last mixture to final milling and pugging operations.

6. The process of mixing White lead comprising, adding to and combiningavith comminuted White lead a primary quantity of oil, and adding to andcombining With said mixture, after a mixing operation, a final oil, and adding to and pugging With said pugged mixture, after a pugging operation, a final quantity of oil, and subjecting said last mixture to final milling and pugging operations. I i

In testimony whereof I afiix my signature this 9 day of October, 1917.

asrmrnien s. Moses. 

